Pinch-bar



(No Model.)

S. H. ST. JOHN.

PINOH BAR Patented Ap 9, 1889.

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UNITED STATES PATENT OFFICE.

SPENCER HOWARD ST. JOHN, OF CHICAGO, ILLINOIS.

PlNCH-BAR.

SPECIFICATION forming part of Letters Patent No. 400,964, dated April 9,1889.

Application filed December 19, 1888. Serial No. 294.083. (N0 model.)

T 0 all whom it may concern.-

Be it known that I, SPENCER HOWARD ST. JOHN, a citizen of the UnitedStates and resident of Chicago, county of Cook, and State of Illinois,have invented new and useful Improvements in Pinch-Bars or Car-Movers,of which the following is a full, clear, and exact description.

The object of my invention is to provide'a hard-metal fulcrunrbar.having anumber of sharp edges which may be repeatedly sharpened, and aguide-clevis, both to be removably attached to the pinch-bar withoutweakening the same by recessing it.

In the accompanying drawings, which are made a part of thisspecification, Figure 1 shows a perspective of my improved pinchbar;Fig. 2, a View of the clevis and fulcrumbar removed from the main bar;Fig. 3, a side View of the main bar, with the clevis and fulcrum-bar insection.

The main bar A, consisting of the handle a and head a, may be of anydesired form. Fitting astride of the bar A is the clevis B, whose arms 61), extending a short distance below the bar, fall upon either side ofthe rail when the tool is in use, and serve as guides to retain it inplace. Extending transversely across this clevis, and fitted withinsuitable holes, 0, in its arms, is the solid fulcrum-bar C, which may incross-section be in any angular formas, for example, triangular,rectangular, as shown, pentangular, &c. This fulcrum-bar is so locatedwithin the clevis as to fallimmediatelybelow the heel of the main bar Awhen the parts are adjusted.

For the purpose of securely holding the clevis and fulcrum-bar inposition, I place a set-screw, D, in the bow b of the clevis B, whichreacts upon the upper surface and draws the fulcrum-bar C against thelower surface of the bar A. In place of the setscrew D may besubstituted a simple wedge, to be driven between the clevis-bow b andthe bar A, though this I regard as a less desirable and less securemethod than the one shown.

It will be seen that by placing the fulcrumbar C in position so as topresent one of its edges to the rail a secure bearing is obtained. Assoon as one edge becomes dulled the bar C may be turn ed by separatingthe removable parts and another edge brought into use. The several edgesof the bar C may be repeatedly sharpened until the bar is worn almostentirely away, as its size is not material,

the wear being taken up by the set-screw D..

I am aware that the use of a removable hard-metal fulcrum for pinch-barsis not new, and that such bars have been provided with guides, and I donot broadly claim either device.

I do, however, claim as my invention and desire to secure by LettersPatent The combination of a bar, removable fulcrum-piece wholly externalthereto, and a clevis fitting upon said bar, havingdownwardly-projecting arms adapted to embrace the rail, substantially asdescribed.

SPENCER HOWVARD ST. JOHN.

Witnesses:

JOHN G. WEBER, SPENCER WARD.

